browse_api_category

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With no annotations provided, the description carries the behavioral transparency burden. It does explain the behavior of both argument modes and what the user should see ('list all categories' vs 'see its classes'). However, it does not disclose details like return structure, error handling, or whether the operation is strictly read-only, so it is only minimally transparent.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is two sentences with no filler. The main purpose is stated first, and the usage branches are given economically. Every sentence earns its place.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a simple one-parameter tool the description is reasonably complete, but there is no output schema and no annotations, so the description should explain return value shape more concretely. Saying 'see its classes' is vague and does not describe what information about each class will be returned, nor how invalid category names are handled.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The schema already documents the single optional 'category' parameter fully, including examples and the 'Omit to list all categories' note. The description mirrors this information without adding new semantic detail, so the baseline score of 3 is appropriate.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description states a clear verb and resource: 'Browse API categories and their contents.' It also distinguishes two operating modes: no arguments lists all categories, and with a category shows its classes. It does not explicitly contrast itself with sibling tools like search_api or get_api_detail, so it stops short of a 5.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description gives explicit invocation guidance: 'Call with no arguments to list all categories, or specify a category to see its classes.' This provides clear context for when to use the tool, though it does not mention when to prefer search_api or get_api_detail instead, so it lacks exclusionary guidance.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.